def fit(self, sess, local_):
for _ in range(local_):
sess.run(self.inc_step)
x_real, _ = next_batch_(FLAGS.bz)
z = gaussian(FLAGS.bz, FLAGS.z_dim)
for _ in range(3):
sess.run(self.d_optim,
feed_dict={
self.real: x_real,
self.z: z,
is_training: True
})
sess.run(self.g_optim,
feed_dict={
self.real: x_real,
self.z: z,
is_training: True
})
x_real, _ = next_batch_(FLAGS.bz)
return sess.run(
[self.d_loss, self.g_loss, self.fit_summary],
feed_dict={
self.real: x_real,
self.z: gaussian(FLAGS.bz, FLAGS.z_dim),
is_training: False
})
def fit(self, sess, local_):
for _ in range(local_):
x, _ = next_batch_(FLAGS.bz)
sess.run(self.optim, {
self.x: x,
self.z: gaussian(FLAGS.bz, FLAGS.z_dim)
})
x, _ = next_batch_(FLAGS.bz * 5)
return sess.run(
[self.loss, self.loss_nll, self.loss_mmd, self.fit_summary], {
self.x: x,
self.z: gaussian(FLAGS.bz, FLAGS.z_dim)
})
def fit(self, sess, local_):
for _ in range(local_):
x_real, _ = next_batch_(FLAGS.bz)
z = gaussian(FLAGS.bz, FLAGS.z_dim)
for _ in range(3):
sess.run(self.d_adam, feed_dict={self.real: x_real, self.z: z})
sess.run(self.g_adam, feed_dict={self.real: x_real, self.z: z})
x_real, _ = next_batch_(FLAGS.bz)
return sess.run([self.d_loss, self.g_loss, self.fit_summary],
feed_dict={
self.real: x_real,
self.z: gaussian(FLAGS.bz, FLAGS.z_dim)
})
def z_real_(bz):
if FLAGS.z_dist == 'g':
return gaussian(bz, FLAGS.z_dim, 0, 2)
elif FLAGS.z_dist == 'mg':
return gaussian_mixture(bz, FLAGS.z_dim, 10)
else:
return swiss_roll(bz, FLAGS.z_dim, 10)
def sample_unlabeled_data():
x = util.sample_x_variable(batchsize,
conf.ndim_x,
unlabeled_dataset,
gpu_enabled=conf.gpu_enabled)
noise = sampler.gaussian(batchsize,
conf.ndim_x,
mean=0,
var=0.3,
gpu_enabled=conf.gpu_enabled)
# x.data += noise.data
return x
def sample_labeled_data():
x, y_onehot, y_id = util.sample_x_and_label_variables(
batchsize,
conf.ndim_x,
conf.ndim_y,
labeled_dataset,
labels,
gpu_enabled=conf.gpu_enabled)
noise = sampler.gaussian(batchsize,
conf.ndim_x,
mean=0,
var=0.3,
gpu_enabled=conf.gpu_enabled)
# x.data += noise.data
return x, y_onehot, y_id
for t in xrange(1, num_trains_per_epoch + 1):
# reconstruction phase
x = sample_unlabeled_data()
aae.update_learning_rate(conf.learning_rate_for_reconstruction_cost)
aae.update_momentum(conf.momentum_for_reconstruction_cost)
sum_loss_autoencoder += aae.train_autoencoder_unsupervised(x)
# regularization phase
## train discriminator
aae.update_learning_rate(conf.learning_rate_for_adversarial_cost)
aae.update_momentum(conf.momentum_for_adversarial_cost)
loss_discriminator = 0
for k in xrange(n_steps_to_optimize_dis):
if k > 0:
x = sample_unlabeled_data()
z_true = sampler.gaussian(batchsize, conf.ndim_z)
y_true = sampler.onehot_categorical(batchsize, conf.ndim_y)
loss_discriminator += aae.train_discriminator_yz(x, y_true, z_true)
loss_discriminator /= n_steps_to_optimize_dis
sum_loss_discriminator += loss_discriminator
## train generator
sum_loss_generator += aae.train_generator_x_yz(x)
# semi-supervised classification phase
x_labeled, y_onehot, y_id = sample_labeled_data()
aae.update_learning_rate(conf.learning_rate_for_semi_supervised_cost)
aae.update_momentum(conf.momentum_for_semi_supervised_cost)
sum_loss_classifier += aae.train_classifier(x_labeled, y_id)
if t % 10 == 0:
def main():
# load MNIST images
train_images, train_labels = dataset.load_train_images()
# config
config = aae.config
# settings
# _l -> labeled
# _u -> unlabeled
max_epoch = 1000
num_trains_per_epoch = 5000
batchsize = 100
alpha = 1
# seed
np.random.seed(args.seed)
if args.gpu_device != -1:
cuda.cupy.random.seed(args.seed)
# classification
# 0 -> true sample
# 1 -> generated sample
class_true = aae.to_variable(np.zeros(batchsize, dtype=np.int32))
class_fake = aae.to_variable(np.ones(batchsize, dtype=np.int32))
# training
progress = Progress()
for epoch in xrange(1, max_epoch):
progress.start_epoch(epoch, max_epoch)
sum_loss_reconstruction = 0
sum_loss_discriminator = 0
sum_loss_generator = 0
for t in xrange(num_trains_per_epoch):
# sample from data distribution
images_l, label_onehot_l, label_ids_l = dataset.sample_labeled_data(
train_images, train_labels, batchsize)
# reconstruction phase
z_l = aae.encode_x_z(images_l)
reconstruction_l = aae.decode_yz_x(label_onehot_l, z_l)
loss_reconstruction = F.mean_squared_error(
aae.to_variable(images_l), reconstruction_l)
aae.backprop_generator(loss_reconstruction)
aae.backprop_decoder(loss_reconstruction)
# adversarial phase
images_l = dataset.sample_labeled_data(train_images, train_labels,
batchsize)[0]
z_fake_l = aae.encode_x_z(images_l)
z_true_l = sampler.gaussian(batchsize,
config.ndim_z,
mean=0,
var=1)
dz_true = aae.discriminate_z(z_true_l, apply_softmax=False)
dz_fake = aae.discriminate_z(z_fake_l, apply_softmax=False)
loss_discriminator = F.softmax_cross_entropy(
dz_true, class_true) + F.softmax_cross_entropy(
dz_fake, class_fake)
aae.backprop_discriminator(loss_discriminator)
# adversarial phase
images_l = dataset.sample_labeled_data(train_images, train_labels,
batchsize)[0]
z_fake_l = aae.encode_x_z(images_l)
dz_fake = aae.discriminate_z(z_fake_l, apply_softmax=False)
loss_generator = F.softmax_cross_entropy(dz_fake, class_true)
aae.backprop_generator(loss_generator)
sum_loss_reconstruction += float(loss_reconstruction.data)
sum_loss_discriminator += float(loss_discriminator.data)
sum_loss_generator += float(loss_generator.data)
if t % 10 == 0:
progress.show(t, num_trains_per_epoch, {})
aae.save(args.model_dir)
progress.show(
num_trains_per_epoch, num_trains_per_epoch, {
"loss_r": sum_loss_reconstruction / num_trains_per_epoch,
"loss_d": sum_loss_discriminator / num_trains_per_epoch,
"loss_g": sum_loss_generator / num_trains_per_epoch,
})
def main():
# load MNIST images
images, labels = dataset.load_train_images()
# config
config = aae.config
# settings
# _l -> labeled
# _u -> unlabeled
max_epoch = 1000
num_trains_per_epoch = 5000
batchsize_l = 100
batchsize_u = 100
alpha = 1
# seed
np.random.seed(args.seed)
if args.gpu_device != -1:
cuda.cupy.random.seed(args.seed)
# save validation accuracy per epoch
csv_results = []
# create semi-supervised split
num_validation_data = 10000
num_labeled_data = 100
num_types_of_label = 10
training_images_l, training_labels_l, training_images_u, validation_images, validation_labels = dataset.create_semisupervised(
images,
labels,
num_validation_data,
num_labeled_data,
num_types_of_label,
seed=args.seed)
print training_labels_l
# classification
# 0 -> true sample
# 1 -> generated sample
class_true = aae.to_variable(np.zeros(batchsize_u, dtype=np.int32))
class_fake = aae.to_variable(np.ones(batchsize_u, dtype=np.int32))
# training
progress = Progress()
for epoch in xrange(1, max_epoch):
progress.start_epoch(epoch, max_epoch)
sum_loss_reconstruction = 0
sum_loss_supervised = 0
sum_loss_discriminator = 0
sum_loss_generator = 0
for t in xrange(num_trains_per_epoch):
# sample from data distribution
images_l, label_onehot_l, label_ids_l = dataset.sample_labeled_data(
training_images_l, training_labels_l, batchsize_l,
config.ndim_x, config.ndim_y)
images_u = dataset.sample_unlabeled_data(training_images_u,
batchsize_u,
config.ndim_x)
# reconstruction phase
q_y_x_u, z_u = aae.encode_x_yz(images_u, apply_softmax=True)
reconstruction_u = aae.decode_yz_x(q_y_x_u, z_u)
loss_reconstruction = F.mean_squared_error(
aae.to_variable(images_u), reconstruction_u)
aae.backprop_generator(loss_reconstruction)
aae.backprop_decoder(loss_reconstruction)
# adversarial phase
y_fake_u, z_fake_u = aae.encode_x_yz(images_u, apply_softmax=True)
z_true_u = sampler.gaussian(batchsize_u,
config.ndim_z,
mean=0,
var=1)
y_true_u = sampler.onehot_categorical(batchsize_u, config.ndim_y)
discrimination_z_true = aae.discriminate_z(z_true_u,
apply_softmax=False)
discrimination_y_true = aae.discriminate_y(y_true_u,
apply_softmax=False)
discrimination_z_fake = aae.discriminate_z(z_fake_u,
apply_softmax=False)
discrimination_y_fake = aae.discriminate_y(y_fake_u,
apply_softmax=False)
loss_discriminator_z = F.softmax_cross_entropy(
discrimination_z_true, class_true) + F.softmax_cross_entropy(
discrimination_z_fake, class_fake)
loss_discriminator_y = F.softmax_cross_entropy(
discrimination_y_true, class_true) + F.softmax_cross_entropy(
discrimination_y_fake, class_fake)
loss_discriminator = loss_discriminator_z + loss_discriminator_y
aae.backprop_discriminator(loss_discriminator)
# adversarial phase
y_fake_u, z_fake_u = aae.encode_x_yz(images_u, apply_softmax=True)
discrimination_z_fake = aae.discriminate_z(z_fake_u,
apply_softmax=False)
discrimination_y_fake = aae.discriminate_y(y_fake_u,
apply_softmax=False)
loss_generator_z = F.softmax_cross_entropy(discrimination_z_fake,
class_true)
loss_generator_y = F.softmax_cross_entropy(discrimination_y_fake,
class_true)
loss_generator = loss_generator_z + loss_generator_y
aae.backprop_generator(loss_generator)
# supervised phase
unnormalized_q_y_x_l, z_l = aae.encode_x_yz(images_l,
apply_softmax=False)
loss_supervised = F.softmax_cross_entropy(
unnormalized_q_y_x_l, aae.to_variable(label_ids_l))
aae.backprop_generator(loss_supervised)
sum_loss_reconstruction += float(loss_reconstruction.data)
sum_loss_supervised += float(loss_supervised.data)
sum_loss_discriminator += float(loss_discriminator.data)
sum_loss_generator += float(loss_generator.data)
if t % 10 == 0:
progress.show(t, num_trains_per_epoch, {})
aae.save(args.model_dir)
# validation phase
# split validation data to reduce gpu memory consumption
images_v, _, label_ids_v = dataset.sample_labeled_data(
validation_images, validation_labels, num_validation_data,
config.ndim_x, config.ndim_y)
images_v_segments = np.split(images_v, num_validation_data // 500)
label_ids_v_segments = np.split(label_ids_v,
num_validation_data // 500)
num_correct = 0
for images_v, labels_v in zip(images_v_segments, label_ids_v_segments):
predicted_labels = aae.argmax_x_label(images_v, test=True)
for i, label in enumerate(predicted_labels):
if label == labels_v[i]:
num_correct += 1
validation_accuracy = num_correct / float(num_validation_data)
progress.show(
num_trains_per_epoch, num_trains_per_epoch, {
"loss_r": sum_loss_reconstruction / num_trains_per_epoch,
"loss_s": sum_loss_supervised / num_trains_per_epoch,
"loss_d": sum_loss_discriminator / num_trains_per_epoch,
"loss_g": sum_loss_generator / num_trains_per_epoch,
"accuracy": validation_accuracy
})
# write accuracy to csv
csv_results.append([epoch, validation_accuracy])
data = pd.DataFrame(csv_results)
data.columns = ["epoch", "accuracy"]
data.to_csv("{}/result.csv".format(args.model_dir))
def main():
# load MNIST images
images, labels = dataset.load_train_images()
# config
config = aae.config
# settings
max_epoch = 1000
num_trains_per_epoch = 5000
batchsize = 100
alpha = 1
# seed
np.random.seed(args.seed)
if args.gpu_device != -1:
cuda.cupy.random.seed(args.seed)
# classification
# 0 -> true sample
# 1 -> generated sample
class_true = aae.to_variable(np.zeros(batchsize, dtype=np.int32))
class_fake = aae.to_variable(np.ones(batchsize, dtype=np.int32))
# training
progress = Progress()
for epoch in xrange(1, max_epoch):
progress.start_epoch(epoch, max_epoch)
sum_loss_reconstruction = 0
sum_loss_discriminator = 0
sum_loss_generator = 0
sum_loss_cluster_head = 0
for t in xrange(num_trains_per_epoch):
# sample from data distribution
images_u = dataset.sample_unlabeled_data(images, batchsize)
# reconstruction phase
qy_x_u, z_u = aae.encode_x_yz(images_u, apply_softmax=True)
representation = aae.encode_yz_representation(qy_x_u, z_u)
reconstruction_u = aae.decode_representation_x(representation)
loss_reconstruction = F.mean_squared_error(aae.to_variable(images_u), reconstruction_u)
aae.backprop_generator(loss_reconstruction)
aae.backprop_decoder(loss_reconstruction)
# adversarial phase
y_fake_u, z_fake_u = aae.encode_x_yz(images_u, apply_softmax=True)
z_true_u = sampler.gaussian(batchsize, config.ndim_z, mean=0, var=1)
y_true_u = sampler.onehot_categorical(batchsize, config.ndim_y)
discrimination_z_true = aae.discriminate_z(z_true_u, apply_softmax=False)
discrimination_y_true = aae.discriminate_y(y_true_u, apply_softmax=False)
discrimination_z_fake = aae.discriminate_z(z_fake_u, apply_softmax=False)
discrimination_y_fake = aae.discriminate_y(y_fake_u, apply_softmax=False)
loss_discriminator_z = F.softmax_cross_entropy(discrimination_z_true, class_true) + F.softmax_cross_entropy(discrimination_z_fake, class_fake)
loss_discriminator_y = F.softmax_cross_entropy(discrimination_y_true, class_true) + F.softmax_cross_entropy(discrimination_y_fake, class_fake)
loss_discriminator = loss_discriminator_z + loss_discriminator_y
aae.backprop_discriminator(loss_discriminator)
# adversarial phase
y_fake_u, z_fake_u = aae.encode_x_yz(images_u, apply_softmax=True)
discrimination_z_fake = aae.discriminate_z(z_fake_u, apply_softmax=False)
discrimination_y_fake = aae.discriminate_y(y_fake_u, apply_softmax=False)
loss_generator_z = F.softmax_cross_entropy(discrimination_z_fake, class_true)
loss_generator_y = F.softmax_cross_entropy(discrimination_y_fake, class_true)
loss_generator = loss_generator_z + loss_generator_y
aae.backprop_generator(loss_generator)
# additional cost function that penalizes the euclidean distance between of every two of cluster
distance = aae.compute_distance_of_cluster_heads()
loss_cluster_head = -F.sum(distance)
aae.backprop_cluster_head(loss_cluster_head)
sum_loss_reconstruction += float(loss_reconstruction.data)
sum_loss_discriminator += float(loss_discriminator.data)
sum_loss_generator += float(loss_generator.data)
sum_loss_cluster_head += float(aae.nCr(config.ndim_y, 2) * config.cluster_head_distance_threshold + loss_cluster_head.data)
if t % 10 == 0:
progress.show(t, num_trains_per_epoch, {})
aae.save(args.model_dir)
progress.show(num_trains_per_epoch, num_trains_per_epoch, {
"loss_r": sum_loss_reconstruction / num_trains_per_epoch,
"loss_d": sum_loss_discriminator / num_trains_per_epoch,
"loss_g": sum_loss_generator / num_trains_per_epoch,
"loss_c": sum_loss_cluster_head / num_trains_per_epoch,
})
def main(run_load_from_file=False):
# load MNIST images
images, labels = dataset.load_train_images()
# config
opt = Operation()
opt.check_dir(config.ckpt_dir, is_restart=False)
opt.check_dir(config.log_dir, is_restart=True)
# setting
max_epoch = 510
num_trains_per_epoch = 500
batch_size_u = 100
# training
with tf.device(config.device):
h = build_graph()
sess_config = tf.ConfigProto(allow_soft_placement=True,
log_device_placement=True)
sess_config.gpu_options.allow_growth = True
sess_config.gpu_options.per_process_gpu_memory_fraction = 0.9
saver = tf.train.Saver(max_to_keep=2)
with tf.Session(config=sess_config) as sess:
'''
Load from checkpoint or start a new session
'''
if run_load_from_file:
saver.restore(sess, tf.train.latest_checkpoint(config.ckpt_dir))
training_epoch_loss, _ = pickle.load(
open(config.ckpt_dir + '/pickle.pkl', 'rb'))
else:
sess.run(tf.global_variables_initializer())
training_epoch_loss = []
# Recording loss per epoch
process = Process()
for epoch in range(max_epoch):
process.start_epoch(epoch, max_epoch)
'''
Learning rate generator
'''
learning_rate = opt.ladder_learning_rate(epoch +
len(training_epoch_loss))
# Recording loss per iteration
training_loss_set = []
sum_loss_reconstruction = 0
sum_loss_supervised = 0
sum_loss_discrminator = 0
sum_loss_generator = 0
process_iteration = Process()
for i in range(num_trains_per_epoch):
process_iteration.start_epoch(i, num_trains_per_epoch)
# sample from data distribution
images_u = dataset.sample_unlabeled_data(images, batch_size_u)
# reconstruction_phase
_, loss_reconstruction = sess.run([h.opt_r, h.loss_r],
feed_dict={
h.x: images_u,
h.lr: learning_rate
})
z_true_u = sampler.gaussian(batch_size_u,
config.ndim_z,
mean=0,
var=1)
y_true_u = sampler.onehot_categorical(batch_size_u,
config.ndim_y)
# adversarial phase for discriminator
_, loss_discriminator_y = sess.run([h.opt_dy, h.loss_dy],
feed_dict={
h.x: images_u,
h.y: y_true_u,
h.lr: learning_rate
})
_, loss_discriminator_z = sess.run([h.opt_dz, h.loss_dz],
feed_dict={
h.x: images_u,
h.z: z_true_u,
h.lr: learning_rate
})
loss_discriminator = loss_discriminator_y + loss_discriminator_z
# adversarial phase for generator
_, loss_generator_y, loss_generator_z = sess.run(
[h.opt_e, h.loss_gy, h.loss_gz],
feed_dict={
h.x: images_u,
h.lr: learning_rate
})
loss_generator = loss_generator_y + loss_generator_z
training_loss_set.append([
loss_reconstruction,
loss_discriminator,
loss_discriminator_y,
loss_discriminator_z,
loss_generator,
loss_generator_z,
loss_generator_y,
])
sum_loss_reconstruction += loss_reconstruction
sum_loss_discrminator += loss_discriminator
sum_loss_generator += loss_generator
if i % 1000 == 0:
process_iteration.show_table_2d(
i, num_trains_per_epoch, {
'reconstruction': sum_loss_reconstruction /
(i + 1),
'discriminator': sum_loss_discrminator / (i + 1),
'generator': sum_loss_generator / (i + 1),
})
# In end of epoch, summary the loss
average_training_loss_per_epoch = np.mean(
np.array(training_loss_set), axis=0)
# append validation accuracy to the training loss
training_epoch_loss.append(average_training_loss_per_epoch)
loss_name_per_epoch = [
'reconstruction',
'discriminator',
'discriminator_y',
'discriminator_z',
'generator',
'generator_z',
'generator_y',
]
if epoch % 1 == 0:
process.show_bar(
epoch, max_epoch, {
'loss_r': average_training_loss_per_epoch[0],
'loss_d': average_training_loss_per_epoch[1],
'loss_g': average_training_loss_per_epoch[4],
})
plt.tile_images(sess.run(h.x_, feed_dict={h.x: images_u}),
dir=config.log_dir,
filename='x_rec_epoch_{}'.format(
str(epoch).zfill(3)))
if epoch % 10 == 0:
saver.save(sess,
os.path.join(config.ckpt_dir, 'model_ckptpoint'),
global_step=epoch)
pickle.dump((training_epoch_loss, loss_name_per_epoch),
open(config.ckpt_dir + '/pickle.pkl', 'wb'))
def gen(self, sess, bz):
return sess.run(self.fake,
feed_dict={
self.z: gaussian(bz, FLAGS.z_dim),
is_training: False
})
def gen(self, sess, bz):
return sess.run([self.gen_x, self.gen_summary], {self.z: gaussian(bz, FLAGS.z_dim)})
def main():
# load MNIST images
images, labels = dataset.load_train_images()
# config
config = aae.config
# settings
# _l -> labeled
# _u -> unlabeled
max_epoch = 1000
num_trains_per_epoch = 5000
batchsize_l = 100
batchsize_u = 100
alpha = 1
# seed
np.random.seed(args.seed)
if args.gpu_device != -1:
cuda.cupy.random.seed(args.seed)
# save validation accuracy per epoch
csv_results = []
# create semi-supervised split
num_validation_data = 10000
num_labeled_data = 100
num_types_of_label = 10
training_images_l, training_labels_l, training_images_u, validation_images, validation_labels = dataset.create_semisupervised(
images, labels, num_validation_data, num_labeled_data,
num_types_of_label)
# classification
# 0 -> true sample
# 1 -> generated sample
class_true = aae.to_variable(np.zeros(batchsize_u, dtype=np.int32))
class_fake = aae.to_variable(np.ones(batchsize_u, dtype=np.int32))
# training
progress = Progress()
for epoch in xrange(1, max_epoch):
progress.start_epoch(epoch, max_epoch)
sum_loss_reconstruction = 0
sum_loss_supervised = 0
sum_loss_discriminator = 0
sum_loss_generator = 0
sum_loss_cluster_head = 0
for t in xrange(num_trains_per_epoch):
# sample from data distribution
images_l, label_onehot_l, label_ids_l = dataset.sample_labeled_data(
training_images_l, training_labels_l, batchsize_l)
images_u = dataset.sample_unlabeled_data(training_images_u,
batchsize_u)
# reconstruction phase
qy_x_u, z_u = aae.encode_x_yz(images_u, apply_softmax=True)
representation = aae.encode_yz_representation(qy_x_u, z_u)
reconstruction_u = aae.decode_representation_x(representation)
loss_reconstruction = F.mean_squared_error(
aae.to_variable(images_u), reconstruction_u)
aae.backprop_generator(loss_reconstruction)
aae.backprop_decoder(loss_reconstruction)
# adversarial phase
y_fake_u, z_fake_u = aae.encode_x_yz(images_u, apply_softmax=True)
z_true_u = sampler.gaussian(batchsize_u,
config.ndim_z,
mean=0,
var=1)
y_true_u = sampler.onehot_categorical(batchsize_u, config.ndim_y)
dz_true = aae.discriminate_z(z_true_u, apply_softmax=False)
dy_true = aae.discriminate_y(y_true_u, apply_softmax=False)
dz_fake = aae.discriminate_z(z_fake_u, apply_softmax=False)
dy_fake = aae.discriminate_y(y_fake_u, apply_softmax=False)
loss_discriminator_z = F.softmax_cross_entropy(
dz_true, class_true) + F.softmax_cross_entropy(
dz_fake, class_fake)
loss_discriminator_y = F.softmax_cross_entropy(
dy_true, class_true) + F.softmax_cross_entropy(
dy_fake, class_fake)
loss_discriminator = loss_discriminator_z + loss_discriminator_y
aae.backprop_discriminator(loss_discriminator)
# adversarial phase
y_fake_u, z_fake_u = aae.encode_x_yz(images_u, apply_softmax=True)
dz_fake = aae.discriminate_z(z_fake_u, apply_softmax=False)
dy_fake = aae.discriminate_y(y_fake_u, apply_softmax=False)
loss_generator_z = F.softmax_cross_entropy(dz_fake, class_true)
loss_generator_y = F.softmax_cross_entropy(dy_fake, class_true)
loss_generator = loss_generator_z + loss_generator_y
aae.backprop_generator(loss_generator)
# supervised phase
log_qy_x_l, z_l = aae.encode_x_yz(images_l, apply_softmax=False)
loss_supervised = F.softmax_cross_entropy(
log_qy_x_l, aae.to_variable(label_ids_l))
aae.backprop_generator(loss_supervised)
# additional cost function that penalizes the euclidean distance between of every two of cluster
distance = aae.compute_distance_of_cluster_heads()
loss_cluster_head = -F.sum(distance)
aae.backprop_cluster_head(loss_cluster_head)
sum_loss_reconstruction += float(loss_reconstruction.data)
sum_loss_supervised += float(loss_supervised.data)
sum_loss_discriminator += float(loss_discriminator.data)
sum_loss_generator += float(loss_generator.data)
sum_loss_cluster_head += float(
aae.nCr(config.ndim_y, 2) *
config.cluster_head_distance_threshold +
loss_cluster_head.data)
if t % 10 == 0:
progress.show(t, num_trains_per_epoch, {})
aae.save(args.model_dir)
# validation phase
images_v_segments = np.split(validation_images,
num_validation_data // 1000)
labels_v_segments = np.split(validation_labels,
num_validation_data // 1000)
sum_accuracy = 0
for images_v, labels_v in zip(images_v_segments, labels_v_segments):
qy = aae.encode_x_yz(images_v, apply_softmax=True, test=True)[0]
accuracy = F.accuracy(qy, aae.to_variable(labels_v))
sum_accuracy += float(accuracy.data)
validation_accuracy = sum_accuracy / len(images_v_segments)
progress.show(
num_trains_per_epoch, num_trains_per_epoch, {
"loss_r": sum_loss_reconstruction / num_trains_per_epoch,
"loss_s": sum_loss_supervised / num_trains_per_epoch,
"loss_d": sum_loss_discriminator / num_trains_per_epoch,
"loss_g": sum_loss_generator / num_trains_per_epoch,
"loss_c": sum_loss_cluster_head / num_trains_per_epoch,
"accuracy": validation_accuracy
})
# write accuracy to csv
csv_results.append([epoch, validation_accuracy])
data = pd.DataFrame(csv_results)
data.columns = ["epoch", "accuracy"]
data.to_csv("{}/result.csv".format(args.model_dir))
def gen(self, sess, bz):
return sess.run(self.fake,
feed_dict={self.z: gaussian(bz, FLAGS.z_dim)})
def main(run_load_from_file=False):
# load MNIST images
images, labels = dataset.load_test_images()
# config
opt = Operation()
opt.check_dir(config.ckpt_dir, is_restart=False)
opt.check_dir(config.log_dir, is_restart=True)
max_epoch = 510
num_trains_per_epoch = 500
batch_size_u = 100
# training
with tf.device(config.device):
h = build_graph()
sess_config = tf.ConfigProto(allow_soft_placement=True,
log_device_placement=True)
sess_config.gpu_options.allow_growth = True
sess_config.gpu_options.per_process_gpu_memory_fraction = 0.9
saver = tf.train.Saver(max_to_keep=2)
with tf.Session(config=sess_config) as sess:
'''
Load from checkpoint or start a new session
'''
if run_load_from_file:
saver.restore(sess, tf.train.latest_checkpoint(config.ckpt_dir))
training_epoch_loss, _ = pickle.load(
open(config.ckpt_dir + '/pickle.pkl', 'rb'))
else:
sess.run(tf.global_variables_initializer())
training_epoch_loss = []
# Recording loss per epoch
process = Process()
for epoch in range(max_epoch):
process.start_epoch(epoch, max_epoch)
'''
Learning rate generator
'''
learning_rate = 0.0001
# Recording loss per iteration
sum_loss_reconstruction = 0
sum_loss_discrminator_z = 0
sum_loss_discrminator_img = 0
sum_loss_generator_z = 0
sum_loss_generator_img = 0
process_iteration = Process()
for i in range(num_trains_per_epoch):
process_iteration.start_epoch(i, num_trains_per_epoch)
# Inputs
'''
_l -> labeled
_u -> unlabeled
'''
images_u = dataset.sample_unlabeled_data(images, batch_size_u)
if config.distribution_sampler == 'swiss_roll':
z_true_u = sampler.swiss_roll(batch_size_u, config.ndim_z,
config.num_types_of_label)
elif config.distribution_sampler == 'gaussian_mixture':
z_true_u = sampler.gaussian_mixture(
batch_size_u, config.ndim_z, config.num_types_of_label)
elif config.distribution_sampler == 'uniform_desk':
z_true_u = sampler.uniform_desk(batch_size_u,
config.ndim_z,
radius=2)
elif config.distribution_sampler == 'gaussian':
z_true_u = sampler.gaussian(batch_size_u,
config.ndim_z,
var=1)
elif config.distribution_sampler == 'uniform':
z_true_u = sampler.uniform(batch_size_u,
config.ndim_z,
minv=-1,
maxv=1)
# reconstruction_phase
_, loss_reconstruction = sess.run([h.opt_r, h.loss_r],
feed_dict={
h.x: images_u,
h.lr: learning_rate
})
# adversarial phase for discriminator_z
images_u_s = dataset.sample_unlabeled_data(
images, batch_size_u)
_, loss_discriminator_z = sess.run([h.opt_dz, h.loss_dz],
feed_dict={
h.x: images_u,
h.z: z_true_u,
h.lr: learning_rate
})
_, loss_discriminator_img = sess.run([h.opt_dimg, h.loss_dimg],
feed_dict={
h.x: images_u,
h.x_s: images_u_s,
h.lr: learning_rate
})
# adversarial phase for generator
_, loss_generator_z = sess.run([h.opt_e, h.loss_e],
feed_dict={
h.x: images_u,
h.lr: learning_rate
})
_, loss_generator_img = sess.run([h.opt_d, h.loss_d],
feed_dict={
h.x: images_u,
h.lr: learning_rate
})
sum_loss_reconstruction += loss_reconstruction
sum_loss_discrminator_z += loss_discriminator_z
sum_loss_discrminator_img += loss_discriminator_img
sum_loss_generator_z += loss_generator_z
sum_loss_generator_img += loss_generator_img
if i % 1000 == 0:
process_iteration.show_table_2d(
i, num_trains_per_epoch, {
'reconstruction':
sum_loss_reconstruction / (i + 1),
'discriminator_z':
sum_loss_discrminator_z / (i + 1),
'discriminator_img':
sum_loss_discrminator_img / (i + 1),
'generator_z':
sum_loss_generator_z / (i + 1),
'generator_img':
sum_loss_generator_img / (i + 1),
})
average_loss_per_epoch = [
sum_loss_reconstruction / num_trains_per_epoch,
sum_loss_discrminator_z / num_trains_per_epoch,
sum_loss_discrminator_img / num_trains_per_epoch,
sum_loss_generator_z / num_trains_per_epoch,
sum_loss_generator_img / num_trains_per_epoch,
(sum_loss_discrminator_z + sum_loss_discrminator_img) /
num_trains_per_epoch,
(sum_loss_generator_z + sum_loss_generator_img) /
num_trains_per_epoch
]
training_epoch_loss.append(average_loss_per_epoch)
training_loss_name = [
'reconstruction', 'discriminator_z', 'discriminator_img',
'generator_z', 'generator_img', 'discriminator', 'generator'
]
if epoch % 1 == 0:
process.show_bar(
epoch, max_epoch, {
'loss_r': average_loss_per_epoch[0],
'loss_d': average_loss_per_epoch[5],
'loss_g': average_loss_per_epoch[6]
})
plt.scatter_labeled_z(
sess.run(h.z_r, feed_dict={h.x: images[:1000]}),
[int(var) for var in labels[:1000]],
dir=config.log_dir,
filename='z_representation-{}'.format(epoch))
if epoch % 10 == 0:
saver.save(sess,
os.path.join(config.ckpt_dir, 'model_ckptpoint'),
global_step=epoch)
pickle.dump((training_epoch_loss, training_loss_name),
open(config.ckpt_dir + '/pickle.pkl', 'wb'))
def main(run_load_from_file=False):
# load MNIST images
images, labels = dataset.load_train_images()
# config
opt = Operation()
opt.check_dir(config.ckpt_dir, is_restart=False)
opt.check_dir(config.log_dir, is_restart=True)
# setting
max_epoch = 510
num_trains_per_epoch = 500
batch_size_l = 100
batch_size_u = 100
# create semi-supervised split
num_validation_data = 10000
num_labeled_data = 100
num_types_of_label = 10
training_images_l, training_labels_l, training_images_u, validation_images, validation_labels = dataset.create_semisupervised(
images, labels, num_validation_data, num_labeled_data,
num_types_of_label)
# training
with tf.device(config.device):
h = build_graph()
sess_config = tf.ConfigProto(allow_soft_placement=True,
log_device_placement=True)
sess_config.gpu_options.allow_growth = True
sess_config.gpu_options.per_process_gpu_memory_fraction = 0.9
saver = tf.train.Saver(max_to_keep=2)
with tf.Session(config=sess_config) as sess:
'''
Load from checkpoint or start a new session
'''
if run_load_from_file:
saver.restore(sess, tf.train.latest_checkpoint(config.ckpt_dir))
training_epoch_loss, _ = pickle.load(
open(config.ckpt_dir + '/pickle.pkl', 'rb'))
else:
sess.run(tf.global_variables_initializer())
training_epoch_loss = []
# Recording loss per epoch
process = Process()
for epoch in range(max_epoch):
process.start_epoch(epoch, max_epoch)
'''
Learning rate generator
'''
learning_rate = opt.ladder_learning_rate(epoch +
len(training_epoch_loss))
# Recording loss per iteration
training_loss_set = []
sum_loss_reconstruction = 0
sum_loss_supervised = 0
sum_loss_discrminator = 0
sum_loss_generator = 0
sum_loss_cluster_head = 0
process_iteration = Process()
for i in range(num_trains_per_epoch):
process_iteration.start_epoch(i, num_trains_per_epoch)
# sample from data distribution
images_l, label_onehot_l, label_id_l = dataset.sample_labeled_data(
training_images_l, training_labels_l, batch_size_l)
images_u = dataset.sample_unlabeled_data(
training_images_u, batch_size_u)
# additional cost function that penalizes the euclidean between of every two of cluster
if epoch == 0:
for j in range(5):
starting_labels, ending_labels = dataset.cluster_create_dataset(
config.ndim_y)
_, loss_transform = sess.run(
[h.opt_t, h.loss_t],
feed_dict={
h.g_s: starting_labels,
h.g_e: ending_labels,
h.lr: learning_rate
})
# reconstruction_phase
_, loss_reconstruction = sess.run([h.opt_r, h.loss_r],
feed_dict={
h.x: images_u,
h.lr: learning_rate
})
z_true_u = sampler.gaussian(batch_size_u,
config.ndim_z,
mean=0,
var=1)
y_true_u = sampler.onehot_categorical(batch_size_u,
config.ndim_y)
# adversarial phase for discriminator
_, loss_discriminator_y = sess.run([h.opt_dy, h.loss_dy],
feed_dict={
h.x: images_u,
h.y: y_true_u,
h.lr: learning_rate
})
_, loss_discriminator_z = sess.run([h.opt_dz, h.loss_dz],
feed_dict={
h.x: images_u,
h.z: z_true_u,
h.lr: learning_rate
})
loss_discriminator = loss_discriminator_y + loss_discriminator_z
# adversarial phase for generator
_, loss_generator_y, loss_generator_z = sess.run(
[h.opt_e, h.loss_gy, h.loss_gz],
feed_dict={
h.x: images_u,
h.lr: learning_rate
})
loss_generator = loss_generator_y + loss_generator_z
# supervised phase
_, loss_generator_supervised = sess.run([h.opt_ey, h.loss_ey],
feed_dict={
h.x: images_l,
h.y_s: label_id_l,
h.lr: learning_rate
})
training_loss_set.append([
loss_reconstruction, loss_discriminator,
loss_discriminator_y, loss_discriminator_z, loss_generator,
loss_generator_z, loss_generator_y,
loss_generator_supervised, loss_transform
])
sum_loss_reconstruction += loss_reconstruction
sum_loss_discrminator += loss_discriminator
sum_loss_generator += loss_generator
sum_loss_supervised += loss_generator_supervised
sum_loss_cluster_head += loss_transform
if i % 1000 == 0:
process_iteration.show_table_2d(
i, num_trains_per_epoch, {
'reconstruction': sum_loss_reconstruction /
(i + 1),
'discriminator': sum_loss_discrminator / (i + 1),
'generator': sum_loss_generator / (i + 1),
'supervise': sum_loss_supervised / (i + 1),
'cluster_head': sum_loss_cluster_head / (i + 1)
})
# In end of epoch, summary the loss
average_training_loss_per_epoch = np.mean(
np.array(training_loss_set), axis=0)
# validation phase
images_v_segments = np.split(validation_images,
num_validation_data // 1000)
labels_v_segments = np.split(validation_labels,
num_validation_data // 1000)
sum_accuracy = 0
for images_v, labels_v in zip(images_v_segments,
labels_v_segments):
y_v = sess.run(h.y_r, feed_dict={h.x: images_v})
accuracy = opt.compute_accuracy(y_v, labels_v)
sum_accuracy += accuracy
validation_accuracy = sum_accuracy / len(images_v_segments)
# append validation accuracy to the training loss
average_loss_per_epoch = np.append(average_training_loss_per_epoch,
validation_accuracy)
training_epoch_loss.append(average_loss_per_epoch)
loss_name_per_epoch = [
'reconstruction', 'discriminator', 'discriminator_y',
'discriminator_z', 'generator', 'generator_z', 'generator_y',
'supervised', 'transform', 'validation_accuracy'
]
if epoch % 1 == 0:
process.show_bar(
epoch, max_epoch, {
'loss_r': average_loss_per_epoch[0],
'loss_d': average_loss_per_epoch[1],
'loss_g': average_loss_per_epoch[4],
'loss_v': average_loss_per_epoch[9],
})
plt.tile_images(sess.run(h.x_, feed_dict={h.x: images_u}),
dir=config.log_dir,
filename='x_rec_epoch_{}'.format(
str(epoch).zfill(3)))
if epoch % 10 == 0:
saver.save(sess,
os.path.join(config.ckpt_dir, 'model_ckptpoint'),
global_step=epoch)
pickle.dump((training_epoch_loss, loss_name_per_epoch),
open(config.ckpt_dir + '/pickle.pkl', 'wb'))
plt.plot_double_scale_trend(config.ckpt_dir)
